The final version of Windows 10 comes with Microsoft´s new Edge browser which is lightining fast. If you activate the hidden asm.js setting, Edge becomes even faster.
The version of Edge coming with Windows 10 has asm.js turned off as Microsoft is still working on a fully stable implementation. If want to enable asm.js on Microsoft Edge, you can do it in the hidden flags-settings.
1. Open the hidden developer settings menu
Type about:config or about:flags in the address bar. This opens the developer settings menu of Microsoft Edge.